Die-casting machine



Oct. 16 1923. 1,470,672

J. AMBROSE DIE CASTING MACHINE Filed J n. 24. 1921 4 Sheets-Sheet 1 a2, WM AMA/Mam fitter/Megs Oct. 16, 1923. 1,470,672

J. AMBROSE DIE CASTING MACHINE Filed Jan. 24. 1921 4 Sheets-Sheet 3 Sum/MM mmWFA/Wm Oct. 7 16, 1923.

J. AMBROSE DIE CASTING MACHINE 1921 1 4 Sheets-Sheet 5 Filed Jan. 24

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1,470,672 J. AMBROSE DIE CASTING MACHINE Filed Jan. 24. 1921 4 Sheets-Sheet 4 auozuto c 3 MM wmm/amm Oct 15,1923.

STATES PATENT OFFICE.

JOSEPH AMBROSE, OF DETROIT, MICHIGAN, ASSIGNOR TO MICHIGAN SHELTDIO AND BEFIN'ING COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

DIE-CASTING MACHINE.

Application filed January 24, 1921. Serial No. 439,588.

To all whomz'tmay concern:

Be it known that I, Josnrn Aunnosn, a citizen of the United States of:A1nerica, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Die- Casting Machines, of which the following is a specification, reference being bad therein to the accompanying drawings.

' The invention relates to die casting machines and has for one of its objects the provision of means movable with a mold section when being separated from another mold section for withdrawing the gate from the other mold section. Another object is I the provision of yieldable means for forcing the inner mold section away from the pot for a limited distance -to facilitate movement of the same with the outer mold sec{ tion. Further objects reside in forming the pot with a cylindrical portion which is 'engageable by cylinders of different inter ing through the aperture and being subsequently forced into the mold. The invention resides in still other features of construction and novel arrangements and combinations of parts as more fully hereinafter set forth.

In the drawings:

Figure 1 is a top plan view partly in section of a die casting machine embodying my invention;

Figure 2 is a. longitudinal central sectional central sectional view, partly lIl elevation. thereof;

Figure 3 is an end view thereof:

Figure 4 is a cross section on the line 4-4 of Figure 1;

Figure 5 is an enlarged sectional v ew of the mold sections and holders, partly in elevation;

Figures ,6 and 7 are respectively a side elevation of a plunger and a longitudinally central cross section through a cylinder of defi'erent effective diameters from the corresponding parts shown in Figure 2.

l is a pot containing the molten metal and provided with the nozzle 2 and the pump 3 for forcing the molten metal in predetermined amounts through the nozzle, 4 is a sectional mold,, which in the present instance, comprises the inner die block 5 and outer die b ock 6 which cooperate to form the cavity 7. 8 is the holder for the inner die block and 9 the holder for the outer die .block, the inner die block having the projection 10 with the passageway 11 therethrough for placing the cavity 7 in communication with the nozzle 2. -.This projection extends through the holder 8 and preferably has the spherical recess 12 in its end which is adapted to be fitted in by the spherical end 13 of the nozzle.

The holders 8 and "'9 slidably engage at their opposite ends thesparallel horizontally extending rods 14 which extend from the pot 1 through the stationary end frame member 15' to which they are secured as by means of the nuts 16. 17 is a suitable standard having the bearings 18 for engaging the rods, this standard being inside the end frame member 15.

For moving the inner and outer die blocks relative to the nozzle 2 there is the non-revoluble screw 19 which is fixedly secured at its inner end to the outer die block holder 9, and threadedly engaged .by the collar 20 passing through the end frame.

member 15. For preventing the collar 20 from moving longitudinally, the same has the shoulders 21 and 22 at opposite sides of the end frame member and to permit of easy rotation of the collar, suitable antifriction bearings 23 are provided between the shoulders and the end frame member. 24 is a worm wheel non-rotatably secured to the collar 20 and engaged by the worm 25 upon the vertically extending drive shaft 26, which latter is suitably driven from the electrical motor 2'7 'ith the construction as thus far described, upon rotation of the collar 20 in the roper direction, the screw 19 will be longitudinally moved inward, thereby movpassageway 11 into the cavity 7 formed by the die blocks after which the die blocks are moved horizontally away from the nozzle. In order to facilitate the simultaneousoutward movement of both the die blocks for a limited distance, there are coil springs 28 surrounding the inner ends of t the rods 14. and abutting the pot 1 and the inner die block holder 8, these coil springs being under compression when the parts are in position, to receive the molten metal. Upon continued outward movement of the screw 19, the inner die block with its holder,

continue to move outwardly with the outer die block and its holder due to the frictionand there is a pin 31 pivotally'secured to the holder 9 as at 32. This pin extends through the outer die block and inner die block into the passageway 11 and has a cross section at its free end providingclearance inthe passageway for the passage of the molten metal into the cavity within the die blocks. Thus after the inner die block holder 8has engagedlthe heads 30 of the stops 29 and upon continued outward movement of the outer die block with its holder,-

the vpin 31 engaging the gate which has solidified, withdraws the same from the pasalso have annular flanges 41 at their upper ends. Cap bolts 42 engaging these flanges,

secure the cylinders to the cylindrical portion, and for readily removing the cylinders from the cylindrical portion, other cap bolts 43 are provided threadedly engaging the flanges of the cylinders, but abutting the flanges of the cylindrical portion so that upon proper rotation of these latter cap bolts after the former have been disengaged, the cylinders are moved outwardly relative to the cylindrical porti0ns,'the walls of these sageway 11 and away from the inner die block so that after the casting has been removed, the partslare again readyto be moved inwardly to be in position ,for the next casting operation.

To maintain the metal in the pot 1 in molten state, suitable burners 33. are provided therebeneath, and to prevent blocking of the nozzle 2 by metal which has soparts being preferably provided with a draft to permit of the more easy engagement and disengagement of'the same. i

To prevent the entrance of dross into, the pump, the cylindrical portion 35 has the aperture 44 near its upper'end and below the normal level of the 'molten metal in the pot and also has the apron 45 extending from its top downwardly into the molten metal, so vthat any molten metal entering within the pump cylinder through the aperture 46 in its wall registering with the aperture 44 in the wall of the cylindrical portion must pass beneath the lower end of the a ron.

ger may be connected ,to extend in several different directions to make the same more accessible for operation. As shown, projections 48 are formed upon the apron to which the link 49 may be pivotally connected at its lower end. The .lever 47 has one end pivotally connected to the upper end The lever 47 for actuating the pump plunof this link and has an intermediate portion lidified, the nozzle is upwardly inclined and a burner is located beneath its upper end..

The spherical end section 34 of the nozzle also ha its passageway upwardly inclined so that any molten metal which does not remain in the cavity 7 between the die blocks or in the assageway 11, will flow back into the mo ten metal in the nozzle.

For the purpose of pumping different amounts of molten metal through the nozzle, depending upon the size of the cavity within the die blocks,'I have provided the pot 1 with the upwardly extending cylindrical portion 35 which is adapted to interchangeably receive cylinders of different internal diameters. As shown in Fi ures 1 and 2, the cylinder 36 has a wall 0 less thickness than the wall of the cylinder 37 shown in pivotally connected to the link 50' in turn pivotally connected-to the piston. By disconnecting the, lower end of the link 49,

the same may be rotatively, adjusted and connected to another projection, thereby changing the position of the lever.

What I-claim as my invention is 1. The combination with a nozzle for the passage of molten metal, of a sectional mold, a passageway for placing the cavity within said mold in communication with 7 said nozzle, means for moving said sectional mold bodily away from said nozzle, stationary means for subsequently separating the mold sections, and means movable with 'one of the mold sections for moving the gate from said passageway during the separation of the mold sections.

2. The combinatiton with a nozzle for the passage of mdlten metal, of inner and outer cooperating die blocks, a pasageway for placing the cavity within said die blocks into communication with said nozzle, means for simultaneously withdrawing said inner and outer die blocks from said nozzle, stationary means for subsequently withdrawing said outer die block from said inner die block, andmeans movable with said outer die bloclg for withdrawing the gate from said passageway. 3. The combination with a nozzle for. the passage of molten metal, of a, pair of inner and outer cooperating die blocks, means secured to said outer die'block for moving both of said die blocks toward and away from said nozzle, and means for yieldably moving said inner die block away from said nozzle a limited distance.

a. The combination with a nozzle for the passage of molten metal, of a pair of inner and outer cooperating die blocks, means secured to said outer dieblock for moving 'movement of said outer die block separation will occur.

5. The combination with a nozzle for the passage of molten metal, of a pair of coopcrating outer and inner die blocks, holders for said die blocks, a longitudinally movable member secured to said outer die block for movin both of said die'blocks toward and away rom said nozzle, means for guiding said holdersin their movement, resilient means for forc' the holder for said inner die block away rom said nozzle a limited distance, and stops e ageable by said last mentioned holder for hunting its movement away from said nozzle.

6. The combination with a nozzle for the passage of molten metal, of. a pair of cooperatin outer and inner die blocks holders for said die blocks, a lon itudinallymovable member secured to sai outer die block for movin both of said die blocks toward and away rom said nozzle, means for iding said holders in their movements, resilient means for forein the holder for said inner die block away rom said nozzle aflimited distance, and stops engageable by said last mentioned holder for hmitin its movement away from said nozzle, an a pin movable'with said outer die block apd enga ing the gate for withdrawing the latter rom said inner die block upon continued movementl of said outer die block away from said nozz e.

7. The combination with a pair of coop crating die blocks, of a threaded, rod non- P .said mo d in communicatlon wlth said nozrotatably secured to one of said-die blocks for moving the same toward and away from the other of said die blocks, a rotatable collar threadedly engaging said rod and power driven means for-rotating said collar.

8. The combination with a pot containing molten metal, of a pair of cooperating die blocks, a threaded rod fixedly secured to one of said die blocks for moving said die blocks toward and away from said pot, a stationary frame member, a collar threadedly engaging said rod and extending through said frame member, said frame member, anti-friction bearings between said frame member and shoulders, and power driven means for rotating said collar.

9. The combination with a pot containing molten metal and having an upwardly inclined nozzle portion and a cylinder receiving portion, of a cylinder insertable within said cylinder receiving portion and detachably secured thereto, a plunger longitudinally movable within said cylinder, said cylinder receiving portion and said cylinder being-provided with means for placing the interior of said cylinder in communication with the space in said pot outside of said cylinder receiving portlon.

10. The combination with a pot containing molten metal and having an upwardly inclined nozzel portion and a cylinder receiving portion. of a cylinder insertable within said cylinder receiving portion, a plun er longitudinally movable within said cylinder, means for placing the interior of said cylinder in communication with the space in said receptacle outside of said cylinder receiving portion, means for securing said cylinder to said cylinder receiving portion, and means for forcing said cylinder out of said cylinder receiving portion.

11. The combination with a pot containing molten metal andhaving an upwardly extending cylindrical portion with an aperture near its upper end, of a plunger longitudinally movable within said cylindrical portion, and an apronsecuretl to said cylindrical portion above said aperture and extending downwardly into the molten metal below the said aperture for preventing the entrance of dross into said aperture.

12. The combination with a pot containing molten metal and having an upwardly extending cylindrical portion with an aperture near its upper end, of a plunger longitudinally I movable within said cylindrical.

way for placing the cavity within g the entrance zle means for moving .said sectional mold bodily away from said nozzle, and stationary means for substantially separating the inclined nozzle portion and a cylinder receiving portion, of a linder insertabll'e within said cylinder receiving portion, and

cylinder; said cylinder receiving portion and said cylinder having registering openings .formed therein for placing the interior of said cylinder in communication. with the space in said pot outside of said cylinder receiving portion. p

In testimony whereof I afiix my si ature.

JOSEPH AMBROSE. 

